A week after President Barack Obama urged insurers to renew policies that don't meet all the requirements of the health law, it remains unclear how many people might be affected by the proposed fix. That's because regulators in at least a half dozen states say they won't allow insurers to do it and many more have yet to decide. Even if states give insurers a green light to reinstate the policies, many insurers say they're not sure if they can pull it off in time and no one knows how many customers who received the cancellations will want to renew.